"Seeing the victim clutching his abdomen in pain and moaning, the defendant states he rolled the victim on to his side, effectively putting him in the recovery position.

"As the defendant walked away, he looked back to see the victim roll from his side over onto his back still clutching his abdomen and moaning."

Stewart and his friend then left, avoiding a police patrol that had arrived in the carpark.

An autopsy showed Izak died as a result of blunt impact trauma to his torso and head and had suffered liver laceration, hemoperitoneum (blood between the abdomenal membrane and abdominal wall) and a nasal fracture.

He also had bruising and grazes to the right and left side of his face and a large bruise on his upper left torso.

Stewart told police he did not need to chase Izak, but had decided he wanted to "teach him a lesson and in doing so, he wanted to hurt him, but had no idea that his actions would lead to the victim's death".

Stewart was remanded in custody to appear for sentencing in the High court at Wellington in February.